Improvement in dreftqlng-machines



UNITED STATES ....ATENT Fries.

IMPROVEMENT IN DREGlNG-VIACHINES.

Specication forming part of Letters Patent No.` 10d-,757, dated June 2S, 1870.

To all whom 'it may concerne Be itlmown thati, RALPH ROBERT Oscoop, of rlroy, in the county of Rensselaer and State of New York, have invented a new and Improved Dredging-Machine; and Ido hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference bein g had totheaccom pan ying drawings, forming` a part of this specilication, in which` l Figure Lrepresents a side elevation, partly in section, o f my improved dredging-machine. Fig. 2 is a plan or top view ofthe saine.

fg Simitar "letters of reference indicate corresponding parts.

M yinvention relates to dredging-machines;

` and it consists,rst,in suspending the load by means of `pulleys and a chain fastened to the driving-shaft, sothat the carriage will be always Ikept in a perpendicular line with the scoop by the weight ofthe load; second, in the arrangement of a pair ofloose clutch-pulleys between the driving and winding shafts, to reverse theniotion of the winding-shaft.

Ain the drawings represents the frame of myilnproved dredging-machine. lt is pivoted or otherwise secured to a boat or other apparatus.

B is the driving or niain shaft, billig in the lower part of the frame. To it is secured one end of a chain,(},which is the.elevating-chain.

i D is the scoop or scraper secured to a shank or arm, E, of suitable length. The inner or upper end of the shank E rests on ashaft, F, which is hung in the frame A. Theshank has either teeth formedon it that mesh into a pinion on F, or a chain, a, is secured with both ends toopposite ends of the shank and is wound once around the shaft F, as shown.

To the scoop is secured a sheave-block, G.

i rlhe end of the chain C is secured to this block,

passes over a roller, b, which is hung on or forms part of a carriage, H, then down over the block G, and up again Overa pulley, c, and thence to the shaft B. The carriage H rests on the rails d d that project outward from the frame A. It is supported by wheels e, or may,

if desired, slide ou' the rails. Whatever be the positionof thescoop the carriage will always theframe A bythe varying inclination of the elevating-chain -is prevented.

Thechain G passes between the pulleycand shaft B, under a roller, f, and over another roller, g. The roller fis hungloose upon ashaft,

L'which is, by means of a belt, h, or its equiva lent, connected with the shaft F.

The roller g` is hung loose upon a shaft, J, z which is, by a belt, t', or its equivalent, con'- n'ected with I, or with F direct. On each shaft- I and `J is provided a sliding; clutch, L, for locking the loose roller to said shaft. lWillenever, by the clutch, one of' the rollers is locked to its'shaft it will impart motion to the shaft F,

as motion is given to such roller by the chain O. The motion ot' the shaft li is reversed, according to the roller for g with which i; is-in gtre"ang-ithe said rollers being revolved in opposite directions by the chain The rea-:ation ofthe shaftF will cause the arm E to betlrawn in-orcut, according to the directionof motion..

Thus while the scoop or scraper is elevated or lowered it can simultaneously be dra-ws: fir or moved out by the shaft F, and every degree v of motion can therefore be obtained.

Suitableleve1s,l\/I,can be used tooperute the clutches.

llaving;v thus described my invention, what I claim as new, and desire to secure by Lette1"`s`""Pate11t, is-

1. 1n combination with the dipper-handle and scoop, the traveling` shcave and chain, the shea-ve moving on suitable ways, Iso as to be always above, ornearly above, the scoop which it supports, as set forth.

2. The wheelsj" and g, hung; loose upon their respective shaft-s, which are connected with the shalt F to revolve the saine in opposite directions when the wheels f g arcloclted by clutches, as set forth, for the purpose speci-tied.

RALPH ROBERT OSGOOD.

Vitnesses: y

GEO. W. MAYRER, ALEX. F. ROBERTS. 

